Animal Groups & Habitats — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Which animal group has feathers and lays eggs?
A) Mammals
B) Birds
C) Fish
D) Reptiles
Birds are the only animal group that has feathers. All birds also lay eggs.
2. A whale lives in the ocean. Why is it a mammal and not a fish?
A) It has scales.
B) It breathes air and feeds babies milk.
C) It lays eggs underwater.
D) It has gills for breathing.
A whale is a mammal because it breathes air with lungs and feeds its babies milk, even though it lives in the ocean.
3. Which of these animals is an amphibian?
A) Eagle
B) Shark
C) Salamander
D) Rabbit
A salamander is an amphibian because it can live on land and in water and has smooth, moist skin.
4. What body covering do reptiles have?
A) Fur
B) Feathers
C) Scales
D) Smooth wet skin
Reptiles have dry scales covering their bodies that protect them and prevent water loss.
Part B: Fill in the Blank
Write the correct answer on each line.
1. Mammals are the only animals that feed their babies milk.
Mammals are the only animal group that feeds their babies milk from the mother.
2. Amphibians start life in water and later move to land.
Amphibians start life in water breathing with gills, then develop lungs and move to land.
3. A turtle has a hard shell that protects its body.
A turtle has a hard shell on its back that protects it from predators.
4. All birds have feathers even if they cannot fly.
All birds have feathers, which is the one feature that makes them birds, even if they cannot fly.
5. Fish are cold-blooded animals that live in water.
Fish are cold-blooded animals that live in water and breathe through gills.